Carding machines



c. o. MULLENSCHLADER 2,912,721

Nov. 17, 1959 CARDING MACHINES 9 Sheets-Sheet 1 Filed Aug. 2, 1955 lnvenl'or Carl Offo niiuenscmder Mama 5 51m mt 1959 c. o. MULLENSCHLADER 2,91

CARDING MACHINES 9 Sheets-Sheet 5 Filed Aug. 2, 1955 Nov. 17, 1959 c. o. MULLENSCHLADER 2,912,721

CARDING MACHINES Filed Aug. 2, 1955 9 Sheets-Sheet 4 Carl 01/0 lhl llenschl de Nov. 17, 1959 Filed Aug. 2, 1955 c. o. MULLENSCHLADER CARDING MACHINES 9 Sheets-Sheet 5 lnvenl'or' Can 01m Mil/Sawyer v Nov/. 17, 1959 c. o. MULLENSCHLADER 2,912,721

CARDING MACHINES Filed Aug. 2. 1955 9 Sheets-Sheet 6 Carl Ofio fli 'lle s hlcl der by! united 5, S'f/liK ux Nov. 17, 1959 c. o. MULLENSCHLADER 7 2,912,721

CARDING MACHINES Filed Aug. 2, 1955 9 Sheets-Sheet 7 haven/0P arl Oflo Milllenschlzl'der 5. Sm: Hill,

NOV. 17, 19 c. o. MULLENSCHLADER CARDING MACHINES Filed Aug. 2, 1955 9 Sheets-Sheet 8 lnvznfor C n om Mallenschl'der mumem 5. 5mm

1959 c. o. MULLENSCHLADER 2,91

CARDING MACHINES Filed Aug. 2, 1955 9 Sheets-Sheet 9 lnvzn for Carl Of'rn Ml dltns hlc a der WwcA QQ s. 5mm

United States Patent CARDING MACHINES Carl Otto Miillenschladcr, Oberwiehl, Bezirk Koln, Germany The present invention relates to textile manufacturing machines. More particularly, the present invention relates to a carding machine.

The present application is a continuation-in-part of copending application Serial No. 445,539, filed July 26, 1954, now abandoned, and entitled Roller Cards.

With conventional carding machines it is impractical to distribute the worker rolls and stripper rolls about all available parts of the outer periphery of the main roll because it becomes necessary from time to time to remove the worker rolls and stripper rolls and if these rolls are distributed along the front and rear as well as the bottom of the main roll it is impossible with conventional machines to give a carding machine of this type proper maintenance.

' It is an object of the present invention to provide a carding machine with worker rolls and stripper rolls distributed over all of the available outer surface of the main roll while at the same time making it possible for the operator to quickly and easily remove any of the rolls for maintenance purposes.

Another object of the present invention is to provide a carding machine with a frame which permits the operation of the machine to be very easily observed and at the same time prevents flying lint and the like from accumulating in the structure which drives the rolls.

A further object of the present invention is to provide a carding machine capable of being turned quickly and easily to any desired angular position in space.

With the above objects in view the present invention mainly consists of a carding machine which includes a main roll supported for rotation about its axis by a frame means. This frame means is itself supported for turning movement about an axis parallel to the main roll axis. The frame means is provided with a wall means which sub-divides the space located within the outer limits of the frame means into at least two chambers one of which accommodates the several rolls of the carding machine and the other of which houses the driving means for driving the rolls, so that in this way the wall means separates the rolls from their driving means. That portion of the frame means which houses the rolls is preferably covered with a transparent cover means so that the operation of the rolls may be observed from the exterior of the machine.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation together with additional objects and advantage thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

Fig. l is an isometric view of a carding machine according to the present invention;

Fig. 2 is a sectional front elevational view of the carding machine of the present invention, the section of Fig.

. 2 being taken along the line II II of Fig. 5 in the direcmediate chamber 9 (Fig. 2).

,of roll assemblies for feeding .each of these feeding roll assemblies including a pair of .material passing through the machine.

2,912,721 Patented Nov. 17, 1959 h CC 2 tion of the arrows, and the lower supporting portion of Fig. 5 being omitted from Fig. 2 for the sake of clarity;

Fig. 3 is a partly sectional front elevational view of the frame of the carding machine of the present invention, the parts carried by this frame being omitted from Fig. 3;

Fig. 4 is a partly sectional side elevational view of the frame of the present invention together with the supporting structure therefor, the section of Fig. 4 being taken inside of the right end of Fig. 3 looking toward the left and part of the structure carried. by the base of the machine being omitted from Fig. 4v for the sake of clarity;

Fig. 5 is a side elevational view of the machine of the invention as seen from the right side of Fig. 2 with the right wall of Fig. 2 removed to clearly show the parts located behind this right wall;

Fig. 6 is a sectional view of the machine taken along the line VI-VI of Fig. 2 in the direction of the arrows;

Fig. 7 is a sectional view of the machine taken along the line VIIVII of Fig. 2 in the direction of the arrows;

Fig. 8 shows on' an enlarged scale the structure for turnably supporting one of the rolls; and

Fig. 9 is a sectional view taken along the line IX-IX of Fig. 8 in the direction of the arrows.

The carding machine of the present invention has most of its movable parts carried by a cage-like frame means. This frame means includes a pair of rings 1 and 2 respectively located at the ends of the machine and a pair of rigid cross arm assemblies 3 and 4 located between the end rings 1 and 2. Approximately semi-circular rings 5 and 6 are respectively fixed to the cross arms 3 and 4, these rings 5 and 6 extending about the upper half of the machine in the position of the latter illustrated in the drawings. Elements 16 are distributed longitudinally along the machine and are rigidly connected together by the bars 7 which extend longitudinally along the machine in the manner shown in Figs. 2 and 3. Elements 1-6 may be made of any rigid strong structural parts such as the channel iron of substantially U-shaped cross sec- .the working chamber of the carding machine in that the several rolls of the machine are located within this inter- As is most clearly shown in Fig. 6, these rolls include the cylindrical main roll 12 and the doffer roll 13 as well as the pluralityof additional rolls which cooperate with the outer surface of the main roll 12. These additional rolls include a pair the fibers to the main roll,

feed rolls 14 which supply the fibers to the licker-in roll 15. Also, several pairs of rolls 16, 17 are arranged about the outer surface of the main roll 12, rolls 16 being the worker rolls'and rolls 17 being the stripper rolls. A so-called fancy roll also cooperates with the main roll 12, and this roll 90 cooperates with a stripper roll 91. The various rolls arranged about the cylindrical carding surface of the main roll constitute treating means cooperating with the main roll in treating the Furthermore, a pairvof endless belts 18 which may be latticed are located in the chamber 9 for feeding the fibers to the feeder rolls 14. The fiber product issuing from the carding machine may be received by any transporting device which extends into the chamber 9, such as an endless belt which may be latticed, for example, and this transporting means may convey the product to a succeeding carding machine. The product of the carding machine shown in the drawings is removed from the doifer roll 13 by comb 19 a purely conventional way- 111- stead of transporting the product to another carding machine as is described above, it is possible to roll the product up in order to form a roll of fleece, and in this case any suitable known apparatus for rolling up the product may extend into the chamber 9 with its receiving end located adjacent the comb 19.

In the normal position of the machine which is illustrated in the drawings the doffer roll 13 is located directly over the main roll 12. The two fiber feeding assemblies are located at the front side of the machine next to the doffer roll 13 and the fancy roll 90 together with roll 91 are located at the rear side of the machine next to the dotfer roll 13. The worker rolls 16 and stripper rolls 17 are distributed about the remainder of the periphery of the main roll so that these rolls 16 and 17 are located along the front, the rear, and the bottom of the main roll 12. Furthermore, it will be noted that the path along the pairs of rolls 16, 17 is uninterrupted.

The rigid cross arm assemblies 3 and 4 fixedly carry bearings 78 for the main roll shaft 20, bearings 79 for the doffer roll shaft 21 and bearings 80 for the shaft of comb 19 as well as for the shafts which support the rolls of the fiber feeding assemblies. Special bearings are provided for the shafts 22 and 23 of the worker and stripper rolls, respectively, as well as for the shafts 104 and 105 of the rolls 90 and 91, respectively. These special bearings make it easy to disassemble these rolls from the machine. Figs. 8 and 9 show one of these special bearings on an enlarged scale. Thus, as is shown in Figs. 8 and 9 each of the latter bearings includes a rigid body portion 24 integral with an elongated hollow arm 25 which extends radially with respect to the shaft 20. With the carding machine of the invention the bearings 24 are carried by a pair of relatively fiat rings 26 respectively fixed to the cross arm assemblies 3 and 4 at the outer sides of the latter. Each arm 25 is formed with an elongated slot 27 through which a screw 28 passes for clamping the bearing to the ring 26, this screw 28 passing through an opening of the ring 26 as indicated in Fig. 9. A nut which cooperates with the screw 28 engages a washer which in turn engages the outer surface of the elongated arm 25, this washer being wider than the slot 27. At its top free end, as indicated in Figs. 8 and 9, the arm 25 carries a threaded stud 29 which serves to longitudinally adjust the bearing 24. The stud 29 extends through an opening in a flange 30 of ring 26 and a pair of nuts 31 are carried by the stud 29 at opposite sides of the flange 30 so that those nuts may be turned to adjust the longitudinal position of the bearing. Inorder to be able to adjust the bearing 24 about the axis of main roll 12 the side walls of the hollow arm 25 threadedly carry a pair of screws 32 which engage a projection 33 of the ring 26 in the manner shown in Fig. 8. Fig. 4 of the drawings clearly shows one of the rings 26 and the manner in which the projections 33 are distributed about the same. Also, Fig. 4 shows the flange 30 located at the inner periphery of the ring 26.

Each bearing 24 is formed with a fairly large circular recess 92 which receives a ball bearing, and furthermore each bearing 24 is formed with a slot 93 extending to the outer periphery of the bearing and communicating with the recess 92. The slot 93 has a width which is at least as great as the diameter of the shaft extending through slot 93 so that this shaft can pass along the slot 93. The ball bearing which is composed of an inner sleeve 94 forming an inner race, two rows of ball members 95, and an outer race 96, is surrounded by a housing 97 located in the recess 92 and having a cover 98 fixed thereto by the screws 99. The cover 98 is provided with an elongated'tubular extension 108 through which the shaft extends, and this tubular extension also serves as a handle. The housing 97, 98 with the ball bearing therein is set into the recess 92 from the side of the bearing opposed tothe chamber 9 where the rolls are located, and a set screw100clamps the housing in the recess 92. Furthermore, the housing 97 is provided with an extension 101 located in the slot 93 to prevent rotation of the housing 97.

If it is desired to remove one of the rolls 16 or 17 in order to exchange the same, for example, then both of the hearings on the shaft of the roll to be removed are shifted out of the recesses 92 in which they are located after loosening the screws 100, the operator grasping the handles 108 for this purpose. Then the roll to be removed can be shitfed radially away from the main roll 12, the shaft of this roll moving through the slots 93. The roll is replaced with the reverse of these steps.

It should be noted that the inner race 94 of the ball bearing is prevented from turning with respect to the shaft by a pin 102 on the shaft which extends into a notch 103 formed in each inner race 94 when the latter is shifted to its operative position indicated in Fig. 9.

The two lateral chambers 8 and 10 of the frame of the invention serve to house the driving means of the carding machine. Thus, the entire drive is derived from an electric motor 34 supported within the frame means of the invention (Fig. 7). The drive is transmitted from the motor 34, which may be connected through any suitable leads to a source of current, to the main roll 12. The drive is then transmitted from the main roll 12 to the doffer roll 13, and all other parts are driven partly from the main roll and partly from the dotfer roll.

The motor 34 is located within the chamber 8 located to the left of chamber 9, as viewed in Figs. 2 and 3, and the electric motor is fixed to the left end .ring 1 shown in Figs. 2 and 3. The motor is in driving engagement with the shaft 20 of the main roll through the medium of a V -belt drive which includes a V-belt pulley 35 (Fig. 7) carried by the shaft of the motor 34, a plurality of V- belts 36 and a V-belt pulley 37 fixed to the shaft 20 of the main roll 12. The drive is then transmitted from the shaft 20 to elements located in the chamber 10 whichis positioned to the right of intermediate chamber 9, as viewed in Figs. 2 and 3. In this chamber 10 the drive is transmitted from shaft 20 to the shaft 21 of the doffer roll 13. This latter part of the transmission includes a relatively short shaft 38 (Fig. 2) turnably carried by a bearing fixed to the cross arm assembly 4, .a belt drive composed of the pulley 39 fixed to the shaft 20, a belt40, and a pulley 41 fixed to the shaft 38, as well as agear drive which includes the pinion 42 fixed to the shaft 38 and a gear 42 fixed to the doffer roll shaft 21 and mesh ing with the gear 42.

The fiber feeding structure is also driven by a belt drive located within the chamber 10, this latter belt drive including a pulley 44 fixed to the shaft 20, a crossedbelt 45 (Fig. 5), and a pulley 4'7" fixed to the shaft 46 of the lower licker-in roll 15. The shaft 46 drives shaft 49a through a pair of gears'84 (Fig. 7) and apair of unillustrated gears so as to rotate the shaft 4% which fixedly carries the upper liclter-in roll 15. F1'om the two gears 84 a pair of gear trains 85 respectively drive a pair of sprocket chains 86 which drive the endless belts 18 for feeding the fibers to the feeder rolls 14.

Finally, there is located in the chamber 10'the drive for the stripper rolls 17 as well as the fancy roll 90 and its stripper roll 91. As is shown in Fig. 5, this latter drive includes an endless belt 49 in the form of a loop, the inner run of this belt passing about and engaging a pulley 48 fixed to the main roll shaft 20 and then the outer run of the belt 49 passes about pulleys 106 and 1107 respectively fixed to the shafts 104 and 105 of the rolls 9'0 and 91, respectively, and then the belt 49 engages the pulleys 50 which are respectively fixed to the shafts ,23 of the stripper rolls 17.

The drive for the worker rolls '16, on the other hand, is located in the other chamber 8 and is taken from the shaft 21 of the dofi'er roll 13 by means of an endless chain 51 (Fig. '7) which engages the sprooket-52fixed-to the shaft 21 and which then passes about and engages the series of sprockets 53 respectively fixed to the shafts 22 of,the worker rolls'16. The chain 51 is furthermore guided about a sprocket 83"which vmay-be adjustable'in order to regulate the tension of'the sprocket chain 51.

The chamber 8 also houses thedrive from 'the main roll 12 to the comb 19, this latter drive including a pulley 54 fixed to the main'roll shaft 20, a belt 56 passing about and. engaging the pulley 54 and a pulley 55 engaged by the belt 56 andfixed'to the shaft'of the comb'19. In order to provide convenient access to any of the rolls, theframe means 17 is supported for turning movement about an axis parallel to that of the axis of main roll 12. In order to accomplish this result, the frame means is provided 'with'a pair of circular runners at its opposite ends, and these runners are turnably supported. Although the runners can be made of special elements provided for this purpose and fixed' to the'frame, it is simpler to use the end rings 1 and 2 for this purpose,,as shown in the drawings. The support means which supports the frame means of the invention for turning movement includes a pair of relatively low blocks 57 and 58 which are curved at their upperfaces in correspondence to the curvature of the'frame means. The block 57 turnably supports two or more rolls 59 and the block 58turnably supports two'or'mo re rolls 60, these rolls '59 and 60 respectively engagingthe outer surfaces of the rings 1 and 2 to support the frame means. Elongated rigid I-beams 61 or the like (Fig. 4) are fixed at" their ends to blocks 57 and 58 to interconnect these blocks with each other. 7

v In order to turn the frame means on the abovedescribed support means, the rings land 2 respectively have fixed thereto the endless chains 62 which extend completely about the rings and are the equivalent'of gear teeth. These chains 62 and 63 respectively mesh with sprocket wheels 64 and 65 which are respectively fixed to the .ends of a shaft 66 which is rotatably supported by bearingsresp'e ctively carried by the blocks 57 and 58. Since the chains 62 and 63 are fixed to the rings 1 and 2, it is evident that the turning offthe sprockets 64 and 65 will turn the. frame means of the invention. It will be noted, particularly from'Figl 3, that the chains ,62 and 63 are narrower than, the rings land 2, respectively, so that beside the chainsthese rings have a suflicient free outer circular surface to engage the rolls 59 and'60. The I shaft 66 fixedly carries a sprocket wheel 67 located just to the right of the block 57 shown in Fig. 3, and the sprocket 67 meshes with a chain 68 (Fig. 4) which in turn meshes with a sprocket wheel 69 (Fig. 3) driven'by motor 70. The motor 70 is reversible and may be controlled by the operator to turn in either direction for turning the frame means in either direction to any desired angular position. This motor 70 is carried by the same floor which carries the blocks 57 and 58.

Thus, as is apparent from the above-description, it is possible to change the angular position of the carding machine in space in order to locate that part of the carding machine which is to be examined or that part of the carding machine which must be worked on by the operator in a position in which it is easily accessible. In particular, the worker and stripper rolls located along the lower half of the mainroll 12 can be located at the front or rear sides of the machine and at a suitable elevation so that they can be comfortably examined, and

worked on as by being exchanged, if necessary. The 1 'same is trueof the doifer roll 13.

The above-described frame means is provided with a cover means which can be made of sheet metal and which is provided at the front side of the machine with an opening 71 (Fig. '1) for the entry of the fiber material to be worked on. At its rear side this cover means is provided with an opening 72 (Fig. 6) for the transporting structure which carries the fleece away from the carding machine. Otherwise, the interior of the frame is completely shut. This outer cover means includes a cover 73 formed of a series of sections (four, for example) which together form a complete cylinder and which are removably fixed to the frame means. Furthermore, the cover means includes a pair of end walls 74 and 75 each of which is preferably made of a plurality of sectors of a circle (four, for example). The two end walls 74 and 75 are shown in Fig. 2, and Fig. 1 clearly illustrates the manner in which the end wall 75 is divided into four removable sections each of which forms a quadrant, and Fig. 1 also demonstrates the manner in which the covering 73 is divided into sections of a cylinder. It is preferred to make that portion of covering 73 which sur rounds the intermediate chamber 9 of a transparent colorless material so that the operation of the carding machine may be observed without opening the cover means.

In order to prevent fibers or dust from being carried from the working chamber 9 into either of the side chambers 8 or 10 the three chambers are separated from each other by a Wall means composed of a pair of walls 76 respectively arranged between chambers 8 and 9, on the one hand, and chambers 9 and It on the other hand. Each of these walls 76 is made up of a plurality of sheet metal plates fixedly carried by one of the cross arm assemblies 3 or 4. At those locations where rolls which must be removed are located, namely, at the places where the worker and stripper rolls .as'well'as the rolls and 91 are located, the Walls 76 are formed with elongated cutouts 77 v(Fig. 6) which extend inwardly from the outer periphery of each wall 76 and through which the shafts of rolls 16,17, 90 and 91-ex-tend, so that when any one of these latter rolls has to be removed, its shaft may movealon'g the elongated cutouts 77 beyond the wall means 76. For the remaining shafts the intermediate wall means 76 can simply be formed with openings through which these, shafts extend. However, it is also possible to provide the wall means 76 with additional elongated cutouts 82 to accommodate the doifer roll shaft 21 and the shaft of the comb 19, asis indicated in Fig. 6, so that these latter elements may be removed by shifting their shafts along the pair of slots 82l It will be understood that each of the elements described above, or two or more togethenmay also find a useful application in other types of carding machines differing from the types described above.

While the invention has been illustrated anddjescribed as embodied in a carding machine which may be positioned in space, it is notintended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention. Without further analysis, the foregoing will so fully reveal the gist of the present invention that others'can by applying current knowledge readily adapt it for various applications without omittingfeatures'that, from the standpoint of prior art, fairly constitute essential chara'cte'ristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims. 7

What is claimed as new and desired to be secured by Letters Patent is: V

1. In a carding machine, in combination, a main roll having a carding surface; a plurlity of treating means cooperating with said main roll and arranged outside of said main roll about the cylindrical surface thereof; frame means carrying said treating means and carrying also said main roll for rotation about the roll axis; and support means supporting said frame means together with said treating means and said main roll carried by'said frame means turnably about an axis parallel to said main roll axis, so that by turning said frame means about the axis thereof said treating means can be brought in a position for convenient maintenance thereof.

2. In a carding machine, in combination, a main .roll

having a carding surface; a plurality of treating means cooperating with said main roll and arranged outside said main roll about the cylindrical surface thereof; frame means carrying said treating means and carrying also said main roll for rotation about the roll axis, said frame means including a pair of mutually spaced coaxial rings; and roller means engaging said rings for supporting said frame means together with said treating means and said main roll carried by said frame means turnably about an axis parallel to the main roll axis, so that by turning said frame means about the axis thereof said treating means can be brought in position for convenient maintenance thereof.

3. In a carding machine, in combination, a main roll having a carding surface; a plurality of treating means cooperating with said main roll and arranged outside of said main roll about the cylindrical surface thereof; frame means carrying said treating means and carrying also said main roll for rotation about the roll axis; support means supporting said frame means together with said treating means and said main roll carried by said frame means turnably about an axis parallel to said main roll axis; and turning means operatively connected to said frame means for turning the same about said axis parallel to said main roll axis.

4. In a carding machine, in combination, frame means; wall means carried by said frame means and dividing the same into at least two separate chambers; a plurality of rolls having carding surfaces and being carried by said means turnably about their respective roll axes, said plu rality of rolls being located in one of said chambers; drive means operatively connected to said rolls for driving the same, said drive means being located in the other of said chambers, whereby said drive means is separated from said roll by said wall means; and support means supporting said frame means and parts carried thereby for turning movement about an axis parallel to the axis of one of said rolls, so that by turning said frame means about the axis thereof said rolls can be brought into a position for convenient maintenance thereof.

5. In a carding machine, in combination, frame means; Wall means carried by said frame means and dividing the same into at least two separate chambers; a plurality of rolls having carding surfaces and being carried by said means turnably about their respective roll axes, said plurality of rolls being located in one of said chambers; drive means operatively connected to said rolls for driving the same, said drive means being located in the other of said chambers, whereby said drive means is separated from said roll by said wall means; support means supporting said frame means and parts carried thereby for turning movement about an axis parallel to the axis of one of said rolls, so that by turning said frame means about the axis thereof said rolls can be brought into a position for convenient maintenance thereof; and cover means carried by said frame means for enclosing the parts located within the outer limits of said frame means, said cover means being detachedly connected to said frame means and being transparent at the portions thereof which cover said one chamber so that the operation of the rolls in said one chamber may be observed from the exterior of said frame means.

6. In a carding machine, in combination, frame means; Wall means carried by said frame means and dividing the same into at least two separate chambers, said wall means being formed with a plurality of elongated cutouts extending inwardly from the outer periphery of said wall means and having open ends at said periphery; plurality of rolls having carding surfaces located in one of said chambers; a plurality of shafts respectively supporting said rolls and carried by said frame means turnably about the respective shaft axes and shiftably along said cutouts, said shafts extending through said cutouts of said wall means so that said rolls may be removed by shifting said shafts along said cutouts beyond the outer periphery of said wall means; drive means operatively connected to said rolls for driving the same, said drive means being located in the other of said chambers, whereby said drive means are separated from said rolls by said .wall means; and support means supporting said frame means together with the parts carried thereby turnably about an axis parallel to ,the axis of one of said rolls, so that by turning said frame means about the axis thereof said rolls can be brought in a position for convenient maintenance thereof.

7. In a carding machine, in combination, a main roll having a carding surface; a plurality of treating means cooperating with said main roll and arranged outside said main roll about the cylindrical surface thereof; frame means carrying said treating means and carrying also said main roll for rotation about the roll axis, said frame means including a pair of mutually spaced coaxialrings; roller means engaging said rings for supporting said frame means together with said treating means and said main roll carried by said frame means turnably about an axis parallel to the main roll axis; and turning means operatively connected to said frame means for turning the same about said axis parallel to said main roll axis, so that by turning said frame means about the axis thereof said treating means can be brought in position for convenient maintenance thereof.

8. In a carding machine, in combination, a main roll having a carding surface; a plurality of treating means cooperating with said main roll and arranged outside of said main roll about the cylindrical surface thereof; frame means carrying said treating means and carrying also said main roll for rotationabout the roll axis; support means supporting said frame means together with said treating means and said main roll carried by said frame means turnably about an axis parallel to said main roll axis and passing substantially through the center of gravity of the machine; and turning means operatively connected to said frame means for turning the same about said axis parallel to said main roll axis.

9. In a carding machine, in combination, frame means; wall means carried by said framemeans and dividing the same into at least two separate chambers, said wall means being formed with a plurality of elongated cutouts extending inwardly from the outer periphery of said wall means and having open ends at said periphery; a plurality of rolls having carding surfaces located in one of said chambers; a plurality of shafts respectively supporting said rolls and carried by said frame means turnably about the respective shaft axes and shiftably along said cutouts, said shafts extending through said cutouts of said wall means so that said rolls may be removed by shifting said shafts along said cutouts beyond the outer periphery of said wall means; drive means operatively connected to said rolls for driving the same, said drive means being located in the other of said chambers, whereby said drive means are separated from said rolls by said wall means; support means supporting said frame means together with the parts carried thereby turnably about an axis parallel to the axis of one of said rolls, so that by turning said frame means about the axis thereof said rolls can be brought in a position for convenient maintenance thereof; and cover means carried by said frame means for covering the parts located within the outer limits of said frame means, said cover means being detachedly connected to said frame means and being transparent at the portions thereof which cover said one chamber so that the operation of the rolls in said one chamber may be observed from the exterior of said frame means.

References Cited in the file of this patent UNITED STATES PATENTS 2,136,839 Brown Nov. 15, 1938 vFOREIGN PATENTS 174,687 Great Britain J an. 20, 1922 

